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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93befdcd6a1f7c279e5e5e9b5e06af2851ee1ffd9885fd39dc4cbee135fd497c' 
  AND token = 'IdfH5b1C/Wjme16NDwNEaIQwNO6Yqld0Q5TrKuwPkk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}